流动：人的移动，如从一个社会集团，阶级或阶层移向另一社会集团，阶级或阶层。

The movement of people, as from one social group, class, or level to another.

youdao

流动：人的移动，如从一个社会集团，阶级或阶层移向另一社会集团，阶级或阶层。

The movement of people, as from one social group, class, or level to another.

youdao